Operation skin negative pressure lifting device

Abstract

The invention relates to the technical field of medical instruments, in particular to a surgical skin negative pressure lifting device which comprises a negative pressure cylinder, a piston part and a plurality of tensioning mechanisms. The negative pressure cylinder is vertically arranged; the piston piece is installed on the negative pressure cylinder, a suction cavity is defined among the lower end of the piston piece, the inner wall of the negative pressure cylinder and the skin of a patient, and the piston piece can move up and down relative to the negative pressure cylinder; the tensioning mechanism comprises a telescopic frame and a tensioning roller; the interior of the tensioning roller is communicated with the suction cavity through a telescopic frame, and the tensioning roller rotates to promote the skin of the patient to be unfolded towards the side away from the negative pressure cylinder during air inflow. During use, the negative pressure cylinder is placed on the skin of a patient, the piston piece is moved in a reciprocating mode, gas can be squeezed to drive the tensioning rollers to rotate, the skin of the patient below the negative pressure cylinder is unfolded, operation can be completed only by one person, operation is easy, the tensioning rollers of the multiple tensioning mechanisms pull the skin of the patient in the direction away from the negative pressure cylinder with the negative pressure cylinder as the center, and operation is convenient. And the skin of the patient is relaxed more uniformly.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a surgical skin negative pressure lifting device. Background Art

[0002] Pleural effusion and ascites are common concomitant symptoms of lung tumor patients, which can easily cause multiple complications in patients and affect their quality of life. The most commonly used method in clinical practice is puncture to extract fluid. During the puncture process, advanced ultrasound positioning is required to find the best puncture point. However, currently, the operator mainly relies on the hands or surgical towel forceps to lift the patient's abdominal skin to insert the abdominal puncture device. This operation method may cause skin rupture or cyanosis due to excessive pressure, which is traumatic to the patient. In addition, the surgical area is not beautiful and the postoperative incision heals slowly.

[0003] Especially for the elderly, whose skin is loose and wrinkled, after the puncture site is marked, the marked site is easily offset due to the wrinkles and sagging of the skin and the change of body position. At this time, medical staff need to lift the patient's skin with a clip. Although this method can lift the skin to facilitate medical staff to observe and locate, because the skin is only lifted by two symmetrical forces, the skin will be stretched asymmetrically, which makes the positioning of medical staff not accurate enough and affects the smooth progress of the puncture process.

[0004] In the prior art, the invention patent with the announcement number CN117045328B discloses a puncture device with auxiliary positioning function, which increases the volume of the closed cavity formed by the cooperation of the negative pressure shell, the first piston plate, the inner shell, the support frame and the patient's skin, so that the pressure in the closed cavity is reduced to form a negative pressure environment. The negative pressure makes the patient's skin rise upward to form a uniform spherical surface, making the puncture position clear and accurate, and facilitating the positioning of the puncture position by medical staff. However, when the patient's skin is loose and wrinkled, it is difficult for the negative pressure shell to fit tightly with the patient's skin, which affects the efficiency of forming negative pressure in the closed chamber. Summary of the invention

[0005] The invention provides a surgical skin negative pressure lifting device to solve the problem that the suction efficiency of the existing puncture device is affected by skin wrinkles when lifting the skin.

[0006] A surgical skin negative pressure lifting device of the present invention adopts the following technical solution: A surgical skin negative pressure lifting device, used for lifting the patient's skin to facilitate the insertion of a puncture needle, comprises a negative pressure cylinder, a piston and a tensioning mechanism; the negative pressure cylinder is arranged vertically, and the lower end is a flared structure for fitting with the patient's skin; the piston is installed in the negative pressure cylinder, and a suction chamber is defined between the lower end of the piston, the inner wall of the negative pressure cylinder and the patient's skin, and the piston can move up and down relative to the negative pressure cylinder; there are multiple tensioning mechanisms, which are evenly and spacedly distributed around the circumference of the negative pressure cylinder, and each tensioning mechanism includes a telescopic frame and a tensioning roller; the telescopic frame is hinged to the negative pressure cylinder around a horizontal axis, and a first elastic member is arranged between the telescopic frame and the negative pressure cylinder, wherein the hinge axis of the telescopic frame and the negative pressure cylinder is the tangent of the negative pressure cylinder at the hinge position ; A gas channel connected to the suction chamber is provided in the telescopic frame, and a first one-way valve that allows gas to enter the gas channel from the suction chamber is provided at one end of the gas channel close to the suction chamber; a tensioning roller is rotatably installed at the end of the telescopic frame away from the negative pressure cylinder, and the rotation axis of the tensioning roller is parallel to the hinge axis of the negative pressure cylinder and the telescopic frame, and the first elastic member prompts the telescopic frame to rotate until the tensioning roller fits the patient's skin; the interior of the tensioning roller is connected to the gas channel, and when air is taken into the gas channel, it rotates to prompt the patient's skin to unfold to the side away from the negative pressure cylinder; the piston member moves upward to reduce the pressure in the suction chamber, and the piston member moves downward to squeeze the gas in the suction chamber through the gas channel to prompt the tensioning roller to rotate.

[0007] Furthermore, the piston part is a threaded sleeve, which is arranged in the negative pressure cylinder and sealed with the inner wall of the negative pressure cylinder. The negative pressure cylinder limits the piston part to rotate around the vertical axis; a screw part is arranged between the threaded sleeve and the negative pressure cylinder, the lower end of the screw part is threadedly matched with the piston part, and the upper end passes through the upper end of the negative pressure cylinder and rotates with the negative pressure cylinder; the rotation of the screw part drives the threaded sleeve to move up and down; the screw part is a hollow tube, and the upper end is flexibly sealed, and the puncture needle passes through the upper end of the screw part and extends into the suction chamber.

[0008] Furthermore, a mounting ring is fixed outside the negative pressure cylinder; the telescopic frame includes a hinged rod, a transition frame and a mounting frame, one end of the hinged rod is rotatably mounted on the mounting ring and connected to the mounting ring through the first elastic member; a support platform is arranged at the other end of the hinged rod; there are two mounting frames, which are respectively located on both sides of the axial direction of the tensioning roller, and the two ends of the tensioning roller are rotatably mounted on the two mounting frames; the two mounting frames are both slidably mounted on the support platform along the axial direction of the hinged rod, and a second elastic member is arranged between the two mounting frames and the support platform, and the second elastic member causes the tensioning rollers on the two mounting frames to abut against the patient's skin; the transition frame is slidably connected to the hinged rod along its axial direction, and the interior of the transition frame and the hinged rod are both hollow and connected, the interior of the hinged rod is connected to the suction chamber, and the first one-way valve is arranged in the hinged rod; impellers are arranged at both ends of the tensioning roller, and a cover shell arranged outside the impeller is arranged on the transition frame, an air outlet is opened on the cover shell, and a second one-way valve that only allows gas to flow out is arranged at the air outlet; the gas entering the transition frame rotates the tensioning roller by blowing the impeller.

[0009] Furthermore, the mounting ring is a split structure, including an upper closing ring and a lower closing ring distributed up and down, and a plurality of connecting grooves distributed circumferentially around the upper closing ring and the lower closing ring are provided on one side thereof close to each other, and an air duct passing through the negative pressure cylinder is installed in the connecting groove, and the air duct connects the suction chamber with the inside of the hinged rod.

[0010] Furthermore, a hinge groove corresponding to the connecting groove is provided on the side where the upper closing ring and the lower closing ring are close to each other, and a hinge shaft is provided at the end of the hinge rod. After the hinge shaft cooperates with the hinge groove on the upper closing ring or the lower closing ring, the upper closing ring and the lower closing ring cooperate and are fixedly connected.

[0011] Furthermore, a surgical skin negative pressure lifting device also includes a support mechanism, which includes a support frame and a plurality of support units. The support frame is fixed to the negative pressure cylinder, and the plurality of support units are distributed circumferentially around the negative pressure cylinder; each support unit includes a support seat, a plurality of sliding frames and a plurality of support rollers; the support seat and the support frame are spirally matched in the vertical direction; and a third elastic member is arranged between the support seat and the support frame; a plurality of sliding frames are evenly distributed around the support seat, and each sliding frame is radially slidably installed on the support seat, and a fourth elastic member is arranged between the sliding frame and the support seat; each support roller is respectively It is installed on a sliding frame and rotates around a horizontal axis, and the axial direction of the support roller is inclined relative to the sliding direction of the sliding frame, and the inclination directions of multiple support rollers relative to their corresponding sliding frames are consistent; when the support seat and the support frame approach each other in the vertical direction, the rotation of the support seat drives the multiple sliding frames and the support rollers to rotate synchronously, and the support rollers rotate around their own axes while revolving with the sliding frame, and under the action of the inclination of their axes relative to the sliding direction of the sliding frame, the support rollers make the sliding frame extend relative to the support seat, thereby increasing the support area defined by the multiple support rollers.

[0012] Furthermore, a pressure relief port is provided on the side wall of the negative pressure cylinder, the pressure relief port is communicated with the suction chamber, and a pressure relief valve is installed on the pressure relief port.

[0013] Furthermore, the puncture needle is marked with scale lines along its axial direction for recording the displacement of the puncture needle relative to the negative pressure cylinder.

[0014] Optionally, the piston member is a suction cylinder, the lower end of the suction cylinder slides up and down and seals with the inner wall of the negative pressure cylinder, and the upper end of the suction cylinder extends out of the negative pressure cylinder; an elastic locking piece is provided at the upper end of the negative pressure cylinder, and the elastic locking piece locks the position of the suction cylinder when the suction cylinder moves upward to a preset position; a guide cylinder is provided inside the negative pressure cylinder and passes through the suction cylinder, and the lower end of the guide cylinder is flush with the lower end of the negative pressure cylinder for fitting with the patient's skin; the puncture needle passes through the guide cylinder and acts on the patient's skin.

[0015] Furthermore, a limiting groove is provided on the suction cylinder, and the elastic locking member includes a card block and a fifth elastic member connecting the card block and the negative pressure cylinder; the card block abuts against the side wall of the suction cylinder under the action of the fifth elastic member, and cooperates with the limiting groove when the suction cylinder moves upward to a preset position to lock the position of the suction cylinder; an unlocking cylinder is provided outside the negative pressure cylinder, and a wedge surface is provided on the card block, and the unlocking cylinder moves downward to push the wedge surface so that the card block is disengaged from the limiting groove.

[0016] The beneficial effects of the present invention are: the surgical skin negative pressure lifting device of the present invention places the negative pressure cylinder on the patient's skin by setting a tensioning mechanism, and reciprocating the piston part can drive the tensioning rollers of multiple tensioning mechanisms to rotate, so as to stretch the patient's skin under the negative pressure cylinder. Only one person is needed to complete the operation, and the operation is simple. The tensioning rollers of the multiple tensioning mechanisms are centered on the negative pressure cylinder, and at the same time pull the patient's skin away from the negative pressure cylinder. Compared with manually stretching it in advance, the patient's skin is stretched more evenly.

[0017] Furthermore, the support rollers of the multiple support units of the support mechanism are placed on an operating table or a hospital bed to support the negative pressure cylinder so that the negative pressure cylinder can remain vertical. After the suction chamber in the negative pressure cylinder is sucked to a negative pressure, the operator can release the negative pressure cylinder and use the support mechanism to keep the negative pressure cylinder vertical, thereby freeing the operator's hands to perform the puncture operation.

[0018] Furthermore, when the negative pressure cylinder is tilted due to an accidental touch, the support frame squeezes the support seat of at least one support unit on one side downward, causing the support seat to rotate and drive the corresponding multiple sliding frames and multiple support rollers to rotate. The support area defined by the multiple support rollers of the support unit on the squeezed side is increased, the support is more stable, and the further tilting of the negative pressure cylinder is prevented, further ensuring the stability of the puncture process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a surgical skin negative pressure lifting device of the present invention; Figure 2 for Figure 1 The enlarged schematic diagram of the X in the middle; Figure 3 It is a front view of the overall structure of an embodiment of a surgical skin negative pressure lifting device of the present invention; Figure 4 for Figure 3 Schematic diagram of the section along the AA direction; Figure 5 This is a schematic diagram of the disassembly of other structures of an embodiment of a surgical skin negative pressure lifting device of the present invention without the support mechanism; Figure 6 It is an exploded schematic diagram of a mounting ring and one of the tensioning mechanisms in one embodiment of a surgical skin negative pressure lifting device of the present invention; Figure 7 for Figure 6 The enlarged schematic diagram of the Y in the middle; Figure 8 It is a front view of a tensioning mechanism in one embodiment of a surgical skin negative pressure lifting device of the present invention; Fig. 9 for Figure 8 Schematic diagram of the section along the middle BB direction; Fig.10 It is a schematic diagram of the disassembly of a support frame and one of the support units of a support mechanism in one embodiment of a surgical skin negative pressure lifting device of the present invention; Fig.11 It is a schematic cross-sectional view of the overall structure of another embodiment of a surgical skin negative pressure lifting device of the present invention; In the figure: 100, negative pressure cylinder; 110, elastic locking member; 120, guide cylinder; 130, mounting ring; 131, connecting groove; 132, air guide tube; 133, hinge groove; 140, pressure relief port; 150, pressure relief valve; 160, unlocking cylinder; 200, screwing member; 300, threaded sleeve; 310, suction cylinder; 400, puncture needle; 500, tensioning mechanism; 510, hinged rod; 511, support platform; 51 2. Articulated shaft; 520. Transition frame; 521. Cover; 530. Mounting frame; 531. Second elastic member; 540. Tensioning roller; 541. Impeller; 600. Support mechanism; 610. Support frame; 611. Arc segment; 612. Connecting rod; 613. Matching cylinder; 614. Spiral groove; 620. Support seat; 621. Bump; 622. Third elastic member; 630. Sliding frame; 640. Support roller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] An embodiment of a surgical skin negative pressure lifting device of the present invention is used to lift the patient's skin to facilitate the insertion of a puncture needle 400, such as Figures 1 to 10 As shown, it includes a negative pressure cylinder 100, a piston member and a tensioning mechanism 500.

[0023] The negative pressure cylinder 100 is vertically arranged, and the lower end is a flared structure for fitting against the patient's skin, that is, the lower end of the negative pressure cylinder 100 is a cone with the larger end at the bottom.

[0024] The piston is installed on the negative pressure cylinder 100 , and a suction chamber is defined between the lower end of the piston, the inner wall of the negative pressure cylinder 100 and the patient's skin. The piston can move up and down relative to the negative pressure cylinder 100 .

[0025] There are multiple tensioning mechanisms 500, which are evenly and spaced around the negative pressure cylinder 100. Each tensioning mechanism 500 includes a telescopic frame and a tensioning roller 540. The telescopic frame is hinged to the negative pressure cylinder 100 around a horizontal axis, and a first elastic member (not shown in the figure) is arranged between the telescopic frame and the negative pressure cylinder 100, wherein the hinge axis of the telescopic frame and the negative pressure cylinder 100 is the tangent of the negative pressure cylinder 100 at the hinge position. A gas channel connected to the suction chamber is arranged in the telescopic frame, and a first one-way valve (not shown in the figure) is arranged at one end of the gas channel close to the suction chamber to allow gas to enter the gas channel from the suction chamber. The tensioning roller 540 is rotatably installed at one end of the telescopic frame away from the negative pressure cylinder 100, and the rotation axis of the tensioning roller 540 is parallel to the hinge axis of the negative pressure cylinder 100 and the telescopic frame, and the first elastic member prompts the telescopic frame to rotate until the tensioning roller 540 is in contact with the patient's skin; the interior of the tensioning roller 540 is connected to the gas channel, and when air is taken into the gas channel, it rotates to prompt the patient's skin to expand toward the side away from the negative pressure cylinder 100; the piston member moves upward to reduce the pressure in the suction chamber, and the piston member moves downward to squeeze the gas in the suction chamber through the gas channel to prompt the tensioning roller 540 to rotate.

[0026] When in use, the patient lies flat on the operating table or bed, and the negative pressure cylinder 100 is placed vertically on the patient, and the flared structure at the lower end of the negative pressure cylinder 100 is fitted with the patient's skin. When the patient's skin is loose and wrinkled, the flared structure at the lower end of the negative pressure cylinder 100 is difficult to completely fit with the patient's skin, and there is a gap between the patient's skin when it is just placed. After that, the piston member is reciprocated up and down. When the piston member moves upward, the volume of the suction chamber is increased and the pressure is reduced. When the piston member moves downward, the gas in the suction chamber is squeezed into the gas channel in the telescopic frame, so that the tensioning roller 540 rotates to make the skin below the negative pressure cylinder 100 unfold outward. After the piston member reciprocates up and down for many times, the patient's skin below the negative pressure cylinder 100 is stretched, and the flared structure at the lower end of the negative pressure cylinder 100 can completely fit with the patient's skin. After that, the piston member moves upward to bring up part of the skin in the negative pressure cylinder 100, which is convenient for the puncture needle 400 to operate on the skin. During the reciprocating up and down movement of the piston, some gas will enter the suction chamber from the gap between the lower end of the negative pressure cylinder 100 and the patient's skin, and some gas will leave the suction chamber from the gap between the lower end of the negative pressure cylinder 100 and the patient's skin. However, since the gap is small, the impact on the pressure change in the suction chamber is small, and the gas flowing out of the gap is also less than the gas entering the gas channel, which will not affect the rotation of the tensioning roller 540.

[0027] By setting up a tensioning mechanism 500, the negative pressure cylinder 100 is placed on the patient's skin, and the reciprocating movement of the piston can drive the tensioning rollers 540 of the multiple tensioning mechanisms 500 to rotate, so that the patient's skin under the negative pressure cylinder 100 is stretched. Only one person is needed to complete the operation, and the operation is simple. The tensioning rollers 540 of the multiple tensioning mechanisms 500 are centered on the negative pressure cylinder 100, and at the same time pull the patient's skin away from the negative pressure cylinder 100. Compared with manually stretching it in advance, the patient's skin is stretched more evenly.

[0028] In this embodiment, the piston member is a threaded sleeve 300, which is arranged in the negative pressure cylinder 100 and is sealed and fitted with the inner wall of the negative pressure cylinder 100, and the negative pressure cylinder 100 limits the rotation of the threaded sleeve 300 around the vertical axis; specifically, the inner wall of the negative pressure cylinder 100 and the outer wall of the threaded sleeve 300 are both polyhedral surfaces, and the negative pressure cylinder 100 and the threaded sleeve 300 are fitted through the polyhedral surfaces to limit the rotation of the threaded sleeve 300. A screwing member 200 is arranged between the threaded sleeve 300 and the negative pressure cylinder 100, the lower end of the screwing member 200 is threadedly matched with the threaded sleeve 300, and the upper end passes through the upper end of the negative pressure cylinder 100 and rotates with the negative pressure cylinder 100; the rotation of the screwing member 200 drives the threaded sleeve 300 to move up and down; the screwing member 200 is a hollow tube, and the upper end is flexibly sealed, and the puncture needle 400 passes through the upper end of the screwing member 200 and extends into the suction chamber. Specifically, a replaceable sealing rubber is attached to the upper end of the screwing member 200, and the sealing rubber keeps the suction chamber sealed.

[0029] In this embodiment, a mounting ring 130 is fixed to the outside of the negative pressure cylinder 100; the telescopic frame includes a hinged rod 510, a transition frame 520 and a mounting frame 530, one end of the hinged rod 510 is rotatably mounted on the mounting ring 130, and is connected to the mounting ring 130 through the first elastic member; a support platform 511 is provided at the other end of the hinged rod 510. There are two mounting frames 530, which are respectively located on both sides of the tensioning roller 540 in the axial direction, and the two ends of the tensioning roller 540 are rotatably mounted on the two mounting frames 530 respectively; the two mounting frames 530 are both slidably mounted on the support platform 511 along the axial direction of the hinged rod 510, and a second elastic member 531 is provided between the two mounting frames 530 and the support platform 511, and the second elastic member 531 causes the tensioning rollers 540 on the two mounting frames 530 to abut against the patient's skin. The transition frame 520 is connected to the hinge rod 510 by sliding along its axial direction, and the interior of the transition frame 520 and the hinge rod 510 are both hollow and connected, the interior of the hinge rod 510 is connected to the suction chamber, and the first one-way valve is arranged in the hinge rod 510; impellers 541 are arranged at both ends of the tensioning roller 540, and a cover shell 521 is arranged on the transition frame 520 and is sleeved outside the impeller 541. An air outlet is opened on the cover shell 521, and a second one-way valve (not shown in the figure) that only allows gas to flow out is arranged at the air outlet; the gas entering the transition frame 520 blows the impeller 541 to rotate the tensioning roller 540.

[0030] In this embodiment, the mounting ring 130 is a split structure, including an upper closing ring and a lower closing ring distributed up and down, and a plurality of connecting grooves 131 distributed around the circumference of the upper closing ring and the lower closing ring are provided on the sides close to each other, and an air guide tube 132 passing through the negative pressure cylinder 100 is installed in the connecting groove 131, and the air guide tube 132 connects the suction chamber with the interior of the hinge rod 510.

[0031] In this embodiment, a hinge groove 133 corresponding to the connecting groove 131 is provided on the side where the upper closing ring and the lower closing ring are close to each other, and a hinge shaft 512 is provided at the end of the hinge rod 510. After the hinge shaft 512 is matched with the hinge groove 133 on the upper closing ring or the lower closing ring, the upper closing ring and the lower closing ring are matched and fixedly connected. A split mounting ring 130 is provided to facilitate the installation of the hinge rod 510 and the air guide tube 132; and a flange is provided at the lower part of the outer part of the negative pressure cylinder 100 to support the mounting ring 130, and the mounting ring 130 is sleeved on the outer part of the negative pressure cylinder 100 and connected to the flange by bolts.

[0032] In this embodiment, the surgical skin negative pressure lifting device further includes a support mechanism 600 , which includes a support frame 610 and a plurality of support units. The support frame 610 is fixed to the negative pressure cylinder 100 , and the plurality of support units are distributed circumferentially around the negative pressure cylinder 100 . Each support unit includes a support seat 620, multiple sliding frames 630 and multiple support rollers 640; the support seat 620 and the support frame 610 are spirally matched in the vertical direction; and a third elastic member 622 is arranged between the support seat 620 and the support frame 610; specifically, the support frame 610 includes multiple frames distributed circumferentially around the negative pressure cylinder 100, each frame includes an arc segment 611, a connecting rod 612 and a matching cylinder 613, the connecting rod 612 is horizontal and arranged radially along the negative pressure cylinder 100, and connects the arc segment 611 and the matching cylinder 613, the arc segments 611 of the multiple frames form a circular ring and are fixedly connected to the outside of the negative pressure cylinder 100; the matching cylinder 613 is vertically arranged and sleeved on the upper end of the support seat 620, a spiral groove 614 is opened on the inner wall of the matching cylinder 613, and a protrusion 621 for matching with the spiral groove 614 is arranged on the upper end of the support seat 620. A plurality of sliding frames 630 are evenly distributed around the support seat 620, each sliding frame 630 is installed on the support seat 620 along the radial direction of the support seat 620, and a fourth elastic member (not shown in the figure) is arranged between the sliding frame 630 and the support seat 620; each supporting roller 640 is respectively installed on a sliding frame 630 for rotation around a horizontal axis, and the axial direction of the supporting roller 640 is inclined relative to the sliding direction of the sliding frame 630, and the inclination direction of the plurality of supporting rollers 640 relative to the corresponding sliding frame 630 is consistent; specifically, when the supporting seat 620 and the matching cylinder 613 of the supporting frame 610 are close to each other, the supporting seat 620 is in contact with the matching cylinder 613. The rotation direction under the spiral cooperation is a first direction. Along the first direction, one end of the support roller 640 away from the support seat 620 is located at the front side of one end close to the support seat 620, so that when the support seat 620 and the support frame 610 approach each other in the vertical direction, the rotation of the support seat 620 drives the multiple sliding frames 630 and the support roller 640 to rotate synchronously, and the support roller 640 rotates around its own axis while revolving with the sliding frame 630, and under the action of its axis being inclined relative to the sliding direction of the sliding frame 630, the support roller 640 makes the sliding frame 630 extend relative to the support seat 620, thereby increasing the support area defined by the multiple support rollers 640.

[0033] When in use, at least three support units are provided, and the support rollers 640 of the multiple support units are all placed on the operating table or the bed to support the negative pressure cylinder 100 so that the negative pressure cylinder 100 can remain vertical. After the suction chamber in the negative pressure cylinder 100 is sucked to negative pressure, the operator can release the negative pressure cylinder 100 and use the support mechanism 600 to keep the negative pressure cylinder 100 vertical, so that the operator can free his hands to perform the puncture operation. When the negative pressure cylinder 100 is tilted by accidental touch, the support frame 610 squeezes the support seat 620 of at least one support unit on one side downward, so that the support seat 620 rotates and drives the corresponding multiple sliding frames 630 and multiple support rollers 640 to rotate, and the support area defined by the multiple support rollers 640 of the support unit on the squeezed side increases, the support is more stable, and the negative pressure cylinder 100 is prevented from further tilting, further ensuring the stability of the puncture process.

[0034] In this embodiment, a pressure relief port 140 is opened on the side wall of the negative pressure cylinder 100, the pressure relief port 140 is connected to the suction chamber, and a pressure relief valve 150 is installed on the pressure relief port 140. After the operation is completed, the suction chamber is connected to the outside by opening the pressure relief valve 150, so that the negative pressure cylinder 100 can be removed easily.

[0035] In this embodiment, the puncture needle 400 is marked with scale lines (not shown in the figure) along its axial direction, which are used to record the displacement of the puncture needle 400 relative to the negative pressure cylinder 100.

[0036] When the surgical skin negative pressure lifting device of the present invention is used, the multiple support units of the support mechanism 600 are respectively placed on the operating table or bed near the circumference of the patient's operation area, and the support mechanism 600 provides stable support for the negative pressure cylinder 100. The operator supports the negative pressure cylinder 100 with one hand to ensure that its lower end is in contact with the patient's skin and limit the rotation of the negative pressure cylinder 100. At the same time, the tensioning rollers 540 of the multiple tensioning mechanisms 500 are in contact with the patient's skin under the action of the first elastic member between the hinge rod 510 and the mounting ring 130; the operator reciprocates the screwing member 200 with the other hand, so that the threaded sleeve 300 reciprocates up and down. When the threaded sleeve 300 moves upward, the volume of the suction chamber increases and the pressure decreases. When the piston moves downward, the gas in the suction chamber is squeezed into the gas channel in the telescopic frame, so that the tensioning roller 540 rotates to make the skin below the negative pressure cylinder 100 expand outward. After the threaded sleeve 300 moves back and forth up and down for many times, the patient's skin under the negative pressure cylinder 100 is stretched, and the flared structure at the lower end of the negative pressure cylinder 100 can fully fit the patient's skin. Then the threaded sleeve 300 moves upward to lift part of the skin inside the negative pressure cylinder 100 upward, and the rotation of the screw part 200 is stopped. The position of the threaded sleeve 300 is locked by utilizing the threaded cooperation between the screw part 200 and the threaded sleeve 300. Then the negative pressure cylinder 100 is released, and the operator can operate the puncture needle 400 with both hands to operate the raised skin at the bottom of the negative pressure cylinder 100.

[0037] In some other embodiments, different from the above embodiments, the piston member is a suction cylinder 310, such as Fig.11 As shown, the lower end of the suction cylinder 310 slides and seals against the inner wall of the negative pressure cylinder 100, and the upper end of the suction cylinder 310 extends out of the negative pressure cylinder 100; an elastic locking member 110 is provided at the upper end of the negative pressure cylinder 100, and the elastic locking member 110 locks the position of the suction cylinder 310 when the suction cylinder 310 moves upward to a preset position; a guide cylinder 120 passing through the suction cylinder 310 is provided in the negative pressure cylinder 100, and the lower end of the guide cylinder 120 is a flared structure and is flush with the lower end of the negative pressure cylinder 100, and is used to fit against the patient's skin; the puncture needle 400 passes through the guide cylinder 120 to act on the patient's skin. The guide cylinder 120 is provided and its lower end is in contact with the patient's skin to prevent the puncture needle 400 from affecting the negative pressure environment in the suction chamber during puncture.

[0038] Specifically, a limiting groove is provided on the suction cylinder 310, and the elastic locking member 110 includes a card block and a fifth elastic member connecting the card block and the negative pressure cylinder 100; the card block abuts against the side wall of the suction cylinder 310 under the action of the fifth elastic member, and cooperates with the limiting groove when the suction cylinder 310 moves upward to a preset position to lock the position of the suction cylinder 310. An unlocking cylinder 160 is provided outside the negative pressure cylinder 100, and a wedge surface is provided on the card block. The unlocking cylinder 160 moves downward to push the wedge surface so that the card block is separated from the limiting groove. In the process of the suction cylinder 310 reciprocating up and down to rotate the tensioning roller 540 to stretch the patient's skin, the suction cylinder 310 does not move upward to the limiting groove. When the negative pressure cylinder 100 is completely attached to the patient's skin, it can be felt that the resistance to the upward movement of the suction cylinder 310 increases greatly. At this time, the suction cylinder 310 can be moved upward to the limiting groove, and the position of the suction cylinder 310 can be locked by the card block.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A surgical skin negative pressure lifting device, used to lift the patient's skin to facilitate the insertion of a puncture needle, characterized by: It includes a negative pressure cylinder, a piston and a tensioning mechanism; The negative pressure cylinder is arranged vertically, and the lower end thereof is a flared structure for fitting against the patient's skin; The piston is installed in the negative pressure cylinder, and a suction chamber is defined between the lower end of the piston, the inner wall of the negative pressure cylinder and the patient's skin, and the piston can move up and down relative to the negative pressure cylinder; There are multiple tensioning mechanisms, which are evenly and spacedly distributed around the circumference of the negative pressure cylinder, and each tensioning mechanism includes a telescopic frame and a tensioning roller; the telescopic frame is hinged to the negative pressure cylinder around a horizontal axis, and a first elastic member is arranged between the telescopic frame and the negative pressure cylinder, wherein the hinge axis of the telescopic frame and the negative pressure cylinder is the tangent of the negative pressure cylinder at the hinge position; a gas channel connected to the suction chamber is arranged in the telescopic frame, and a first one-way valve is arranged at one end of the gas channel close to the suction chamber to allow gas to enter the gas channel from the suction chamber; the tensioning roller is rotatably installed at the end of the telescopic frame away from the negative pressure cylinder, and the rotation axis of the tensioning roller is parallel to the hinge axis of the negative pressure cylinder and the telescopic frame, and the first elastic member prompts the telescopic frame to rotate until the tensioning roller is in contact with the patient's skin; the interior of the tensioning roller is connected to the gas channel, and when air is taken into the gas channel, it rotates to prompt the patient's skin to unfold to the side away from the negative pressure cylinder; the piston member moves upward to reduce the pressure in the suction chamber, and the piston member moves downward to squeeze the gas in the suction chamber through the gas channel to prompt the tensioning roller to rotate.

2. A surgical skin negative pressure lifting device according to claim 1, characterized in that: The piston member is a threaded sleeve, which is arranged in the negative pressure cylinder and sealed with the inner wall of the negative pressure cylinder. The negative pressure cylinder limits the piston member from rotating around the vertical axis. A screw part is arranged between the threaded sleeve and the negative pressure cylinder. The lower end of the screw part is threadedly matched with the piston member, and the upper end passes through the upper end of the negative pressure cylinder and rotates with the negative pressure cylinder. The rotation of the screw part drives the threaded sleeve to move up and down. The screw part is a hollow tube, and the upper end is flexibly sealed. The puncture needle passes through the upper end of the screw part and extends into the suction chamber.

3. A surgical skin negative pressure lifting device according to claim 1, characterized in that: The piston member is a suction cylinder, the lower end of the suction cylinder slides up and down and seals with the inner wall of the negative pressure cylinder, and the upper end of the suction cylinder extends out of the negative pressure cylinder; an elastic locking piece is provided at the upper end of the negative pressure cylinder, and the elastic locking piece locks the position of the suction cylinder when the suction cylinder moves upward to a preset position; a guide cylinder is provided inside the negative pressure cylinder, and the lower end of the guide cylinder is flush with the lower end of the negative pressure cylinder for fitting with the patient's skin; the puncture needle passes through the guide cylinder and acts on the patient's skin.

4. A surgical skin negative pressure lifting device according to claim 3, characterized in that: A limiting groove is provided on the suction cylinder, and the elastic locking member includes a card block and a fifth elastic member connecting the card block and the negative pressure cylinder; the card block abuts against the side wall of the suction cylinder under the action of the fifth elastic member, and cooperates with the limiting groove when the suction cylinder moves upward to a preset position to lock the position of the suction cylinder; an unlocking cylinder is provided outside the negative pressure cylinder, and a wedge surface is provided on the card block, and the unlocking cylinder moves downward to push the wedge surface so that the card block is disengaged from the limiting groove.

5. The surgical skin negative pressure lifting device according to claim 1, characterized in that: A mounting ring is fixed outside the negative pressure cylinder; the telescopic frame includes a hinged rod, a transition frame and a mounting frame, one end of the hinged rod is rotatably mounted on the mounting ring, and is connected to the mounting ring through the first elastic member; a support platform is arranged at the other end of the hinged rod; there are two mounting frames, which are respectively located on both sides of the axial direction of the tensioning roller, and the two ends of the tensioning roller are rotatably mounted on the two mounting frames; the two mounting frames are both slidably mounted on the support platform along the axial direction of the hinged rod, and a second elastic member is arranged between the two mounting frames and the support platform, and the second elastic member causes the tensioning rollers on the two mounting frames to abut against the patient's skin; the transition frame is slidably connected to the hinged rod along its axial direction, and the interior of the transition frame and the hinged rod are both hollow and connected, the interior of the hinged rod is connected to the suction chamber, and the first one-way valve is arranged in the hinged rod; impellers are arranged at both ends of the tensioning roller, and a cover shell arranged outside the impeller is arranged on the transition frame, an air outlet is opened on the cover shell, and a second one-way valve that only allows gas to flow out is arranged at the air outlet; the gas entering the transition frame causes the tensioning roller to rotate by blowing the impeller.

6. A surgical skin negative pressure lifting device according to claim 5, characterized in that: The mounting ring is a split structure, including an upper closing ring and a lower closing ring distributed up and down. The upper closing ring and the lower closing ring are provided with a plurality of connecting grooves distributed around their circumference on one side thereof. An air duct passing through the negative pressure cylinder is installed in the connecting groove, and the air duct connects the suction chamber with the inside of the hinged rod.

7. A surgical skin negative pressure lifting device according to claim 6, characterized in that: The sides of the upper closing ring and the lower closing ring that are close to each other are also provided with hinge grooves that correspond to the connecting grooves one by one. The end of the hinge rod is provided with a hinge shaft. After the hinge shaft cooperates with the hinge groove on the upper closing ring or the lower closing ring, the upper closing ring and the lower closing ring cooperate and are fixedly connected.

8. The surgical skin negative pressure lifting device according to claim 1, characterized in that: The invention also includes a support mechanism, which includes a support frame and a plurality of support units, the support frame is fixed to the negative pressure cylinder, and the plurality of support units are distributed around the negative pressure cylinder; each support unit includes a support seat, a plurality of sliding frames and a plurality of support rollers; the support seat and the support frame are spirally matched in the vertical direction; and a third elastic member is arranged between the support seat and the support frame; the plurality of sliding frames are evenly distributed around the support seat, and each sliding frame is radially slidably installed on the support seat, and a fourth elastic member is arranged between the support seat; each support roller is respectively rotatably installed on a sliding frame around a horizontal axis, and the axial direction of the support roller is inclined relative to the sliding direction of the sliding frame, and the inclination direction of the plurality of support rollers relative to the corresponding sliding frame is consistent; when the support seat and the support frame are close to each other in the vertical direction, the rotation of the support seat drives the plurality of sliding frames and the support rollers to rotate synchronously, and the support rollers rotate around their own axes while revolving with the sliding frame, and under the action of the inclination of their axes relative to the sliding direction of the sliding frame, the support rollers make the sliding frame extend relative to the support seat, thereby increasing the support area defined by the plurality of support rollers.

9. The surgical skin negative pressure lifting device according to claim 1, characterized in that: A pressure relief port is provided on the side wall of the negative pressure cylinder, the pressure relief port is communicated with the suction chamber, and a pressure relief valve is installed on the pressure relief port.

10. The surgical skin negative pressure lifting device according to claim 1, characterized in that: The puncture needle is marked with scale lines along its axial direction for recording the displacement of the puncture needle relative to the negative pressure cylinder.

Images